单项选择题

A tackle by which the outer end of a boom is raised and lowered is the topping（）.

A.Boom
B.Lift
C.Raise
D.Tackle

<上一题目录下一题>

热门试题

单项选择题

A.A short length of line used for temporarily holding another line
B.A snatch block for handling a topping lift
C.An engine order telegraph
D.The brake on a cargo winch

单项选择题

A stay is（）.

A.Standing rigging
B.A downhaul
C.A halyard
D.A jib